Haha I would expect it from Adams but it generally looks in to good a condition to be their equipment, also all H&S plates/stickers etc are present that’s what made me doubt it lol.
The stoppers are only there to prevent you pulling it apart while shunting in the yard, they were never designed to hold the trailer together down the road. I also think that these sliders that are not maintained properly are the ones that are difficult to open and close up, grease is quite cheap